Packard Forum Index » V-8 (1955-56)

That's the bottom of the carb. A lot of carbs back then used pot metal carb bodies and cast iron bases.

OK, thanks for that info. I thought it might be too easy if all the vacuum attachments were in a base plate. Oh well, we'll just have to figure out the vacuum attachments on the new Edelbrock.

Question: Eric, On the 1955 Four Hundreds, is the vacuum connection made at a port directly into the intake manifold, or is it taken from a port in the carburetor? With the first connection, there would be full manifold vacuum all the time. With the second connection, there would be a variable vacuum amount depending on the throttle butterfly valve position. Different sources would affect how vacuum advance behaves. If I recall correctly from the past, some engines used intake manifold as a source and others used ported carburetor as a source. Does the Edelbrock offer both? Just curious. Thanks.

Depending on what vacuum connection you need, as the distributor's different from the brakes. The Edelbrock has to small ports on the front of it, one's timed and one isn't, consult the manual for which is which. In the rear of it is a large vacuum plug, with an allen wrench head on it, that I removed and put in a fitting to run the brakes with. I've never seen a distributor that worked off of full vacuum, they're always timed.